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Scientific American, Vol. 29, No. 21 (November 1873) (1873)

leaf 3

An illustration from Scientific American, Vol. 29, No. 21 (November 1873), 1873, leaf 3
d westward, 170 feet; eastward,140. Total advance during month, 310 feet. Distance openedfrom east end westward, 14,747 feet; distance opened fromwest end eastward, 10,042 feet. Distance remaining to beopened to November 1, 1873, 242 feet. The whole lengthof the Hoosao tunnel is 25,031 feet. © 1873… … which, though inconsiderable of themselves, nevertheless arenot devoid of interest when made the subjects of the drafts-mans ready pencil. Of such a nature is the process depic-ted in our sketch—merely a molder busily engaged in ram-ming the sand into his flask. The pleasing combination ofform…

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